CN210513022U - Symmetrical wide-range fiber grating displacement sensor - Google Patents
Symmetrical wide-range fiber grating displacement sensor Download PDFInfo
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- CN210513022U CN210513022U CN201921684738.9U CN201921684738U CN210513022U CN 210513022 U CN210513022 U CN 210513022U CN 201921684738 U CN201921684738 U CN 201921684738U CN 210513022 U CN210513022 U CN 210513022U
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Abstract
The utility model provides a fiber grating displacement sensor of wide range of symmetry formula, including sensor housing, displacement measurement conduction pole, roof beam fixing support that have installation inner chamber and being located the fiber grating displacement sensing part that roof beam fixing support both sides and symmetry set up, roof beam fixing support, fiber grating displacement sensing part all are located within the installation inner chamber of sensor housing, unilateral fiber grating displacement sensing part mainly comprises displacement spring deformation fiber grating measuring part and the crooked fiber grating measuring part of intensity beam such as mutual verification and be used for the measuring result check, the measurement displacement volume of displacement measurement conduction pole converts into the physical quantity of surveying, the physical quantity of surveying is displacement spring deformation physical quantity such as and intensity beam bending deformation physical quantity such as. The utility model has the advantages that: the displacement measurement function of a large range can be realized, and the measurement result is more accurate and real.
Description
Technical Field
The utility model relates to a sensor especially relates to a fiber grating displacement sensor of symmetry formula wide range.
Background
In recent years, the research and application of fiber grating sensors have attracted much attention, and compared with the traditional sensing measurement technology, the fiber grating sensing technology has many obvious advantages. For example, the fiber grating has the characteristics of flexible structural form, high temperature resistance, corrosion resistance, strong anti-electromagnetic interference capability, small volume, light weight and the like, and is widely applied to measurement of various physical quantities such as pressure, deformation, displacement, flow, volume, flow rate and the like.
At present, the design and processing method of a displacement sensor is relatively lagged, and the measurement precision, response time, measurement error and the like of displacement cannot meet the requirements of engineering monitoring. Because the bare fiber grating sensing unit is very fine and has extremely small coefficients of stress and temperature sensitivity, and cannot be directly used for measuring actual physical quantities such as displacement, temperature, pressure and the like, the fiber grating sensing unit needs to be designed and packaged according to the measuring environment and the measured physical quantities, and the fiber grating sensing unit can be processed into a fiber grating sensor which can meet the measuring requirements. Meanwhile, the existing displacement fiber grating sensor has preliminary research results, but the test effect of the existing fiber grating sensor for measuring displacement is required to be improved, and the fiber grating sensor is not ideal in the aspects of displacement accuracy, precision, lag time and the like. Therefore, it is necessary to develop a symmetric wide-range fiber grating displacement sensor, which can measure the true displacement value efficiently and quickly, and can measure the large displacement occurring in the engineering.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a fiber grating displacement sensor of symmetry formula wide range.
The utility model provides a symmetrical wide-range fiber grating displacement sensor, which comprises a sensor shell with an installation inner cavity, a displacement measurement conduction rod, a beam fixing support and fiber grating displacement sensing parts which are arranged on two sides of the beam fixing support and are symmetrically arranged, wherein the beam fixing support and the fiber grating displacement sensing parts are arranged in the installation inner cavity of the sensor shell, the fiber grating displacement sensing part on one side mainly comprises an equal-displacement spring deformation fiber grating measuring part and an equal-strength beam bending fiber grating measuring part which are mutually verified and used for measuring result verification, the displacement measurement conduction rod and the sensor shell are a moving pair, the displacement measurement conduction rod penetrates into the installation inner cavity of the sensor shell from the outside and is respectively connected with the equal-displacement spring deformation fiber grating measuring part and the equal-strength beam bending fiber grating measuring part, and the measured displacement of the displacement measurement transmission rod is converted into a measured physical quantity, and the measured physical quantity is an equal-displacement spring deformation physical quantity of the equal-displacement spring deformation fiber bragg grating measuring part and an equal-strength beam bending deformation physical quantity of the equal-strength beam bending fiber bragg grating measuring part.
As a further improvement, the equal displacement spring deformation fiber grating measuring part comprises a spring part fiber grating measuring unit, a tension spring stop block and an equal displacement spring, the displacement measurement conducting rod is connected with the tension spring stop block, the tension spring stop block is connected with one end of the equal displacement spring, the other end of the equal displacement spring is connected with the sensor shell, the spring part fiber grating measuring unit is arranged at the middle part of the equal displacement spring, the displacement measurement conducting rod passes through the displacement that occurs, the tension spring stop block is transmitted to the equal displacement spring, and the spring part fiber grating measuring unit is used for measuring the stress generated by the displacement spring corresponding to the equal displacement spring.
As a further improvement, the crooked fiber grating measuring part of equal strength roof beam includes the wedge, equal strength roof beam, smooth guide rail and equal strength roof beam fiber grating measuring unit, the displacement measurement conduction pole with the wedge is connected, smooth guide rail sets up sensor housing's installation inner chamber, be equipped with the inclined plane on the wedge, the inclined plane respectively with smooth guide rail, the one end of equal strength roof beam slip or roll connection, the other end of equal strength roof beam with roof beam fixing support fixed connection, equal strength roof beam fiber grating measuring unit sets up the middle part of equal strength roof beam, when taking place the displacement, the displacement measurement conduction pole drives the wedge is followed the axis direction of equal strength roof beam removes, the tip of equal strength roof beam receives the oppression on the inclined plane of wedge and takes place the bending, equal strength roof beam fiber grating measuring unit is used for measuring the equal strength roof beam corresponds takes place crooked produced the produced axis direction and removes And (4) stress.
As a further improvement of the present invention, the extension line of the inclined plane of the wedge-shaped block and the included angle between the axes of the displacement measurement conduction rod are acute angles.
As a further improvement, the bottom on the inclined plane of wedge is equipped with the wedge and removes the wheel, the wedge removes the wheel and is located on the smooth guide rail, the one end of constant intensity roof beam is connected with the pulley, the pulley with the inclined plane contact of wedge.
As a further improvement of the utility model, the wedge block is in the shape of a right trapezoid.
As a further improvement of the present invention, the axis direction when the equal strength beam is not subjected to bending deformation is parallel to the axis of the displacement measurement conducting rod.
As a further improvement, the sensor housing is provided with a supply via hole through which the displacement measurement conducting rod penetrates, the via hole is provided with a loose sleeve, and the displacement measurement conducting rod passes through the loose sleeve.
The utility model has the advantages that: through the scheme, the displacement measurement function of a large range can be realized by symmetrically arranging the same fiber bragg grating displacement sensing parts on two sides, the fiber bragg grating displacement sensing part on one side comprises two displacement conversion measurement devices which are respectively an equal-displacement spring deformation fiber bragg grating measurement part and an equal-strength beam bending fiber bragg grating measurement part, the two displacement conversion measurement devices can be balanced with each other, and measurement results can be verified and corrected mutually, so that the measurement results are more accurate and real.
Drawings
Fig. 1 is a schematic view of the main viewing direction of the symmetrical wide-range fiber grating displacement sensor of the present invention.
Fig. 2 is a schematic view of the overlooking direction of the symmetrical wide-range fiber grating displacement sensor of the present invention.
Detailed Description
The present invention will be further described with reference to the following description and embodiments.
As shown in fig. 1 to 2, a symmetric wide-range fiber grating displacement sensor includes a sensor housing 113 having an installation cavity, a displacement measurement conducting rod 101, a beam fixing support 111, and fiber grating displacement sensing portions symmetrically disposed on two sides of the beam fixing support 111, wherein the beam fixing support 111 and the fiber grating displacement sensing portions are both located in the installation cavity of the sensor housing 113, the fiber grating displacement sensing portion on one side is mainly composed of an equal displacement spring deformation fiber grating measuring portion and an equal strength beam bending fiber grating measuring portion, which are mutually verified and used for measuring results, the displacement measurement conducting rod 101 and the sensor housing 113 are a moving pair, the displacement measurement conducting rod 101 penetrates into the installation cavity of the sensor housing 113 from the outside and respectively connects with the equal displacement spring deformation fiber grating measuring portion, The constant-strength beam bending fiber bragg grating measuring part is connected, the measuring displacement of the displacement measuring conducting rod 101 is converted into a measured physical quantity, and the measured physical quantity is the constant-displacement spring deformation physical quantity of the constant-displacement spring deformation fiber bragg grating measuring part and the constant-strength beam bending deformation physical quantity of the constant-strength beam bending fiber bragg grating measuring part.
As shown in fig. 1 to 2, the isodisplacement spring deformation fiber grating measuring part includes a spring portion fiber grating measuring unit 104, a tension spring stopper 106 and an isodisplacement spring 105, the displacement measuring conducting rod 101 is connected to the tension spring stopper 106, the tension spring stopper 106 is connected to one end of the isodisplacement spring 105, the other end of the isodisplacement spring 105 is connected to the inner wall of the sensor housing 113 through a spring fixing support 103, the spring portion fiber grating measuring unit 104 is disposed in the middle of the isodisplacement spring 105, the displacement measuring conducting rod 101 transmits the generated displacement to the isodisplacement spring 105 through the tension spring stopper 106, and the spring portion fiber grating measuring unit 104 is used for measuring the stress generated by the isodisplacement spring 105 corresponding to the generated displacement.
As shown in fig. 1 to 2, the constant strength beam bending fiber grating measuring portion includes a wedge block 107, a constant strength beam 109, a smooth guide rail 112 and a constant strength beam fiber grating measuring unit 110, the displacement measuring conducting rod 101 is connected to the wedge block 107, the smooth guide rail 112 is disposed in an installation cavity of the sensor housing 113, the wedge block 107 is provided with an inclined surface 114, the inclined surface 114 is respectively connected to one end of the smooth guide rail 112 or the constant strength beam 109 in a sliding or rolling manner, the other end of the constant strength beam 109 is fixedly connected to the beam fixing support 111, the constant strength beam fiber grating measuring unit 110 is disposed in the middle of the constant strength beam 109, when displacement occurs, the displacement measuring conducting rod 101 drives the wedge block 107 to move along the axial direction of the constant strength beam 109, the end of the constant strength beam 109 is pressed by the inclined surface 114 of the wedge block 107 to bend, the uniform-strength beam fiber grating measuring unit 110 is used for measuring the stress generated by the bending of the uniform-strength beam 109.
As shown in fig. 1 to 2, an angle between an extension line of the inclined surface 114 of the wedge block 107 and an axis of the displacement measuring conductive rod 101 is an acute angle.
As shown in fig. 1 to 2, a wedge block moving wheel 1081 is disposed at the bottom of the inclined surface 114 of the wedge block 107, the wedge block moving wheel 108 is located on the smooth guide rail 112, one end of the constant-strength beam 109 is connected with a pulley 115, and the pulley 115 is in contact with the inclined surface of the wedge block 107.
As shown in fig. 1 to 2, the wedge block 107 is in a right trapezoid shape, and the right-angle side of the wedge block 107 is connected with the displacement measuring conductive rod 101.
As shown in fig. 1 to 2, the axial direction of the constant-strength beam 109 when it is not subjected to bending deformation is parallel to the axis of the displacement measuring conductive rod 101.
As shown in fig. 1 to 2, a through hole for the displacement measurement conducting rod 101 to penetrate through is formed in the sensor housing 113, a loose sleeve 102 is arranged on the through hole, and the displacement measurement conducting rod 101 penetrates through the loose sleeve 102.
The utility model provides a pair of fiber grating displacement sensor of wide range of symmetry formula, these two measuring parts of equal strength roof beam bending fiber grating measuring part of equal displacement spring deformation fiber grating measuring part and equal strength roof beam measuring part can verify each other and be used for the measuring result check, and displacement measurement conduction pole 101 will measure the displacement volume and convert the displacement volume into the physical quantity of surveying, the physical quantity of surveying does equal displacement spring deformation fiber grating measuring part's equal strength roof beam bending deformation physical quantity with equal strength roof beam bending deformation physical quantity of equal strength roof beam bending fiber grating measuring part, wherein, displacement spring deformation part is: the displacement measurement transmission rod 101 transmits the generated displacement to the equal displacement spring 105 through the tension spring stopper 106, the equal displacement spring 105 fixes one end of the equal displacement spring 105 to the inner side of the sensor shell 113 through the spring fixing support 103, and the spring part fiber grating measuring unit 104 is arranged in the middle of the equal displacement spring 105 and is used for measuring the stress generated by the corresponding displacement of the equal displacement spring 105, so that the first displacement measurement method can be obtained by measuring the fiber grating sensing stress in the equal displacement spring; the equal strength beam bending part is: the displacement that will take place is transmitted to the beam 109 of constant strength through wedge 107 by displacement measurement conduction pole 101 on, wedge 107 below sets up wedge and removes wheel 108 and can slide on smooth guide rail 112 without resistance, simultaneously, beam 109 of constant strength has pulley 115 and wedge 107 contact in one end, and the other end is fixed in on roof beam fixing support 111, and when taking place the displacement, displacement measurement conduction pole 101 will drive wedge 107 along the beam 109 axis direction of constant strength and remove, and beam 109 of constant strength takes place the bending through the pulley 115 of tip along wedge 107 edge.
The utility model provides a symmetrical large-range fiber grating displacement sensor, which is provided with the same displacement measurement parts through bilateral symmetry, and can realize the large-range displacement measurement function; the displacement measuring part on the single side comprises two displacement conversion measuring devices, namely equal displacement spring measurement and equal strength beam bending measurement, the two methods are respectively positioned above and below the displacement measuring conducting rod and can be balanced with each other, and the measurement results can be verified and corrected with each other, so that the measurement results are more accurate and real.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (8)
1. The utility model provides a fiber grating displacement sensor of wide-range of symmetry formula which characterized in that: the device comprises a sensor shell with an installation inner cavity, a displacement measurement conduction rod, a beam fixed support and fiber bragg grating displacement sensing parts which are positioned on two sides of the beam fixed support and are symmetrically arranged, wherein the beam fixed support and the fiber bragg grating displacement sensing parts are positioned in the installation inner cavity of the sensor shell, the fiber bragg grating displacement sensing part on one side mainly comprises an equal-displacement spring deformation fiber bragg grating measuring part and an equal-strength beam bending fiber bragg grating measuring part which are mutually verified and used for measuring result verification, the displacement measurement conduction rod and the sensor shell are moving pairs, the displacement measurement conduction rod penetrates into the installation inner cavity of the sensor shell from the outside and is respectively connected with the equal-displacement spring deformation fiber bragg grating measuring part and the equal-strength beam bending fiber bragg grating measuring part, and the measurement displacement of the displacement measurement conduction rod is converted into a measured physical quantity, the measured physical quantity is the equal displacement spring deformation physical quantity of the equal displacement spring deformation optical fiber grating measuring part and the equal strength beam bending deformation physical quantity of the equal strength beam bending optical fiber grating measuring part.
2. The symmetric wide-range fiber grating displacement sensor of claim 1, wherein: equal displacement spring warp fiber grating measuring part includes spring portion fiber grating measuring unit, stretch-draw spring dog and equal displacement spring, displacement measurement conduction pole with stretch-draw spring dog is connected, stretch-draw spring dog with equal displacement spring's one end is connected, equal displacement spring's the other end with the sensor shell is connected, spring portion fiber grating measuring unit sets up equal displacement spring's middle part, displacement measurement conduction pole passes through the displacement that takes place stretch-draw spring dog transmits to equal displacement spring is last, spring portion fiber grating measuring unit is used for measuring equal displacement spring corresponds the produced stress of displacement.
3. The symmetric wide-range fiber grating displacement sensor of claim 1, wherein: the equal-strength beam bending fiber grating measuring part comprises a wedge-shaped block, an equal-strength beam, a smooth guide rail and an equal-strength beam fiber grating measuring unit, the displacement measurement conduction rod is connected with the wedge-shaped block, the smooth guide rail is arranged in the installation inner cavity of the sensor shell, the wedge-shaped block is provided with an inclined plane which is respectively connected with one end of the smooth guide rail and one end of the equal-strength beam in a sliding or rolling way, the other end of the equal-strength beam is fixedly connected with the beam fixing support, the equal-strength beam fiber grating measuring unit is arranged in the middle of the equal-strength beam, and when displacement occurs, the displacement measurement conduction rod drives the wedge-shaped block to move along the axial direction of the constant-strength beam, the end part of the equal-strength beam is pressed by the inclined plane of the wedge-shaped block to be bent, and the equal-strength beam fiber grating measuring unit is used for measuring stress generated by the equal-strength beam when the equal-strength beam is bent correspondingly.
4. The symmetric wide-range fiber grating displacement sensor of claim 3, wherein: and an included angle between an extension line of the inclined plane of the wedge block and the axis of the displacement measurement conduction rod is an acute angle.
5. The symmetric wide-range fiber grating displacement sensor of claim 3, wherein: the bottom on the inclined plane of wedge is equipped with the wedge and removes the wheel, the wedge removes the wheel and is located on the smooth guide rail, the one end of constant strength roof beam is connected with the pulley, the pulley with the inclined plane contact of wedge.
6. The symmetric wide-range fiber grating displacement sensor of claim 3, wherein: the wedge-shaped block is in a right-angle trapezoid shape.
7. The symmetric wide-range fiber grating displacement sensor of claim 3, wherein: and the axial direction of the constant-strength beam without bending deformation is parallel to the axial line of the displacement measurement transmission rod.
8. The symmetric wide-range fiber grating displacement sensor of claim 1, wherein: the sensor shell is provided with a through hole for the displacement measurement conducting rod to penetrate, a loose sleeve is arranged on the through hole, and the displacement measurement conducting rod penetrates through the loose sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921684738.9U CN210513022U (en) | 2019-10-10 | 2019-10-10 | Symmetrical wide-range fiber grating displacement sensor |
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| CN201921684738.9U CN210513022U (en) | 2019-10-10 | 2019-10-10 | Symmetrical wide-range fiber grating displacement sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542385A (en) * | 2019-10-10 | 2019-12-06 | 深圳市基础工程有限公司 | Symmetrical wide-range fiber grating displacement sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542385A (en) * | 2019-10-10 | 2019-12-06 | 深圳市基础工程有限公司 | Symmetrical wide-range fiber grating displacement sensor |
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